Resumo

NIEVES, Mario et al. Cultivo de microalgas marinas con medios enriquecidos con productos de naturaleza zeolítica. Hidrobiológica [online]. 2000, vol.10, n.1, pp.1-6. ISSN 0188-8897.

The marine microalgae Chaetoceros sp. and Isochrysis sp. were cultured with 5, 10 and 20 mg-l^-1 of the products of zeolitic nature Zestec 56, Zesep 56 and Zeben 06 and generally gave better results than with the control of medium. At the end of exponential growth, Chaetoceros cultures had cell concentrations about 40-50% higher with 20, 10 and 5 mg-l^-1 of the other two products in the case of Isochrysis. Durinh slow growth the best treaments were the same in the case of Chaetoceros, although the differences were numerically less important, while 5 mg-l^-1 of Zesep 56 and 10 mg-l^-1 of Zeben 06 and Zestec 56 gave the highest values with Isochrysis. The results obtained with cell concentrations were confirmed by statistical analysis of relative natality, which compares the number of cell divisions of the treatments to that of the control cultures. They also show that in general the effect of these products is more evident during the exponential phase for Chaetoceros and during slow growth in the case of Isochrysis.

Palavras-chave : Microalgae cultures; Chaetoceros; Isochrysis; products of zeolitic nature.

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